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Maths year 11

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Reply 80
Original post by 34908seikj
Here



Thank you will focus now :smile:)

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Original post by z_o_e
Thank you will focus now :smile:)

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Just make sure with bearings, if you answer is only two numbers like say 50 degrees, you need to add a 0 at the front so it's three numbers - 050 degrees, for example.
Reply 82
Original post by 34908seikj
It's essentially the opposite of compound interest; instead of increasing in value, it decreases.


To calculate compound interest we do, for example 1000*1.1^2 - This will give us the value after 2 years at a rate of 10% compound interest


Now for deprecation we would do 1000*0.9^2 - This will give us the value after 2 years at a rate of deprecation at 10%. (It goes down by 10% of the current value per year)

Just remember with deprecation the decimal must be lower than 1.


Hayaa :smile:
Just did this question..
The question was something like £800 depreciates by 30% in 2 years.

So I did this

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Original post by z_o_e
Hayaa :smile:
Just did this question..
The question was something like £800 depreciates by 30% in 2 years.

So I did this

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Close, you got the percentage the wrong way around when you took it away.


Reply 84
Original post by 34908seikj
Close, you got the percentage the wrong way around when you took it away.



second question :smile:
I feel Confident now!


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Original post by z_o_e
second question :smile:
I feel Confident now!


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Yup, you got it!
Reply 86
Original post by 34908seikj
Yup, you got it!


Yaaay now onto bearings :smile:

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Reply 87
Original post by 34908seikj
Yup, you got it!


Bearing of a from B
Is this 180-72

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(edited 7 years ago)


What was the question?
Reply 89
Original post by 34908seikj
What was the question?


Bearing of A From b

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You always go clockwise and if it's A to B, it will just be 072, or have you wrote the diagram out correctly?
Original post by z_o_e
Bearing of A From b

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Yes, there's two ways of working it out, 360 - the co-interrior angle or the alternate angle + 180
Reply 94
Original post by 34908seikj
Yes, there's two ways of working it out, 360 - the co-interrior angle or the alternate angle + 180


So the answer is 252 degrees? Or 108? :/ I think it's 252

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Original post by z_o_e
So the answer is 252 degrees? Or 108? :/ I think it's 252

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Yes, sorry it's 252 degrees
Reply 96
Original post by 34908seikj
Yes, sorry it's 252 degrees


Any hints on how to do the 3rd one?

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Original post by z_o_e
Any hints on how to do the 3rd one?

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What's the question? A to B?

Ah, its B to A obviously.

think about Co-interior angles.
(edited 7 years ago)
Reply 98
Original post by 34908seikj
What's the question? A to B?

Ah, its B to A obviously.

think about Co-interior angles.


Question is the same ... bearing of A FROM B

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Reply 99
Original post by 34908seikj
What's the question? A to B?

Ah, its B to A obviously.

think about Co-interior angles.

Got something like this


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